Please be aware that Istanbul has multiple airports and that these results are for all airports serving the city.
The best month to arrive at Istanbul is November and the most expensive month to fly is August. (Average prices, based on 1624 datapoints.)
The best day to arrive at Istanbul is Tuesday and it would be best to avoid Friday, as prices are on average 80.55% higher than on Tuesday. (Average prices, based on 267 datapoints.)
The cheapest airline flying to Istanbul is Pegasus Airlines. They are 78% cheaper than Qatar Airways. (Average prices, based on 1872 datapoints.)
At Istanbul the most flights depart around 10:00. (Hourly flights, based on 2659 datapoints.)
From Istanbul it is on average the cheapest to fly to Ankara and to Izmir. (Average prices, based on 188 datapoints.)
From Istanbul most of the flights depart to Antalya, second best connected from Istanbul is Izmir. (Daily flights, based on 283 datapoints.)